Dear friends,
I have been trying to draw a graph of vertices and edges connecting
these vertices in Java and to show them. Does anyone have a blueprint
of such a program.?

I'm trying to use the jstl tags in my struts application.
web.xml
__
 <taglib>

Do you know where to find some peace of software/code which I can
implemented in my desktop java application which will protect it from
illegal using?
I imagine something like: buyer can install my software by using request

I have some JNI code which uses JNI_OnLoad to cache a pointer to the
JVM, found classes and method ids.  I have used the JNI code with IBM's
and Sun's 1.4.2 JDK's on windows and linux.  I wrote a JNI_OnUnload
function to delete the global refs to these classes etc...  I noticed

I am writing a program that interfaces with a serial port device
(router). This application must work for both Linux and Windows
machines. As such, I would like to use Java.
I would like to know what free libraries are available to do serial

I'm struggling with a problem.  In a new feature for an application I'm
maintaining, user-defined code is uploaded to a web application, and run
in a security manager.  The code is permitted to make network
connections to most addresses (excluding those inside the corporate

I am working on optimizing loading of objects.  Here is my problem I
use a base class DataAccessObject.
public class DataAccessObject
{

the following code snippet:
String replacementPattern = "-$1 $2-";
Pattern patter = Pattern.compile("http://(.*?)/(.*)");
pattern.matcher("http://www.example.com/test/index.html").replaceFirst(replacementPattern);

I'm using Eclipse (Linux) and JDK 1.5 with generics.
Eclipse points a warning in my generic code.
This is my code:
// generic LinkedList - this is OK

I find it a bit undesirable that javac would give a "might not have been
initiliazed" warning for this case:
   Object o;
   if (o != null) ...

Can somebody point me at a article/tutorial that explains the differences
between designing a Struts based web app and a portlet based equivalent?

I'm using struts to validate my fields through "validation.xml" file
directives, using dependends="required".
I now have a field which value is required depending on another field
value.

Is there some provision in java programming language to find out the
location of the executing classfile (I mean the path of the file in the
directory structure) at runtime?
I really dont have any clue if this is possible programmatically?

I want to sign a xml file using MD5withRSA. I saw a sample in this
forum :
public static void main(String unused[]) throws Exception {
     String keystoreType     = "JKS";

I want to implement a simple RMI chat with a (Swing-)GUI on the client
side. I manage to send a chat-message to the server and from there to
all clients.
But here the strange things start: the output that should appear in the